• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Novel Fluorescence Method for Cure Monitoring of Hydrosilation-Curable Silicones
【24h】

Novel Fluorescence Method for Cure Monitoring of Hydrosilation-Curable Silicones

机译：用于氢化硅烷化可固化有机硅固化监控的新型荧光方法

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study aimed to evaluate a reactive fluorescent probe, 9,10-bis-(phenylethynyl) anthracene (BPEA), for cure monitoring of hydrosilation-curable silicones. The hydrosilation-curable silicones consisted of a vinyl-terminated polydimethylsiloxane prepolymer, a methylhydrosiloxane-dimethylsiloxane copolymer, and an inhibitor, 1,3-divinyltetramethyldisiloxane. The hydrosilation reaction was catalyzed with the solution of a platinum catalyst in the prepolymer. The catalyst solution also contained a trace amount of the reactive fluorescent probe. Three hydrosilation-curable silicones, with the prepolymer of varying molar mass, were investigated. Each of the hydrosilation-curable silicones was mixed with the catalyst solution at the mass ratio of 1 : 1 to initiate the cure. During the cure of each mixture at 22 C, the elastic modulus of the mixture and the fluorescence spectrum of the probe at the excitation wavelength of 360 nm were measured. Initially, the elastic modulus changed slowly, but then increased rapidly as a result of the increase in molar mass. The elastic modulus leveled off and reached a plateau value at the setting time. The ratio of the fluorescence intensities at 422 and 466 nm increased steadily, and then leveled off and reached a plateau value at the setting time, in agreement with the setting time determined from the change in elastic modulus. The reactive fluorescent probe, BPEA, can therefore be used for nondestructive fluorescence monitoring of hydrosilation-curable silicones.
机译：这项研究旨在评估反应性荧光探针9,10-双-（苯基乙炔基）蒽（BPEA），用于氢化硅烷化可固化有机硅的固化监控。可氢化硅烷化的有机硅由乙烯基封端的聚二甲基硅氧烷预聚物，甲基氢硅氧烷-二甲基硅氧烷共聚物和抑制剂1，3-二乙烯基四甲基二硅氧烷组成。用铂催化剂在预聚物中的溶液催化硅氢化反应。催化剂溶液还包含痕量的反应性荧光探针。研究了三种具有不同摩尔质量的预聚物的可氢化硅烷化的有机硅。将每种可氢化硅烷化的有机硅与催化剂溶液以1：1的质量比混合以引发固化。在22℃下固化每种混合物的过程中，在360nm的激发波长下测量了混合物的弹性模量和探针的荧光光谱。最初，弹性模量变化缓慢，但随后由于摩尔质量的增加而迅速增加。弹性模量趋于稳定并在凝固时间达到平稳值。 422和466 nm处的荧光强度之比稳定增加，然后趋于平稳，并在凝固时间达到平稳值，这与根据弹性模量变化确定的凝固时间一致。因此，反应性荧光探针BPEA可用于氢化硅烷化可固化有机硅的无损荧光监测。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号